Question: Who was Katharine Hepburn married to and when did the marriage end?
Paraphrase: Who was married to Katharine Hepburn and when ended the marriage?
SPARQL (Wikidata): SELECT ?value1 ?obj WHERE { wd:Q56016 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P582 ?value1 . }